20196187 has 12 divisors (see below), whose sum is σ = 23408136. Its totient is φ = 17277440.

The previous prime is 20196173. The next prime is 20196199. The reversal of 20196187 is 78169102.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20196187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20190187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3 + ... + 6355.

It is an arithmetic number, because the mean of its divisors is an integer number (1950678).

Almost surely, 2^20196187 is an apocalyptic number.

20196187 is a deficient number, since it is larger than the sum of its proper divisors (3211949).

20196187 is a wasteful number, since it uses less digits than its factorization.

20196187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6398 (or 6381 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 20196187 is about 4494.0168001466. The cubic root of 20196187 is about 272.3264310055.

The spelling of 20196187 in words is "twenty million, one hundred ninety-six thousand, one hundred eighty-seven".